**isosceles right triangle**, theequal

**sides**make the

**right**angle. They have the ratioofequality, 1 : 1. To find the ratio number of the hypotenuse h,wehave, according to the Pythagorean theorem, h

^{2}=1

^{2}+ 1

^{2}= 2.

Also, how do you find the sides of an isosceles triangle?

To **find** an unknown **side** ofa**triangle**, you must know the length of other two**sides**and/or the altitude. To **find** the unknown base ofan**isosceles triangle**, using the following **formula**: 2*sqrt(L^2 – A^2), where L is the length of the other two legs andAis the altitude of the **triangle**.

what is isosceles right angle triangle? One of the special types of **triangle** isthe**isosceles triangle**. Some pointers about**isoscelestriangles** are: It has two equal sides. It has twoequal**angles**, that is, the base **angles**. When thethird**angle** is **90 degree**, it is called a **rightisoscelestriangle**.

Also to know, what are the sides of an isosceles right triangle?

An **isosceles right triangle** is an**isoscelestriangle** and a **right triangle**. This meansthat it hastwo congruent **sides** and one **right** angle.Therefore,the two congruent **sides** must be thelegs.

What is the formula of a isosceles triangle?

An **isosceles triangle** is identified by twobaseangles being of equal proportion, or congruent, and thetwoopposing sides of those angles being the same length. Solveforarea just as you would any other **triangle** usingthe**formula** Area = 1/2 B x H, where B is the base and H istheheight.

## What do the sides of an isosceles triangle add up to?

**isosceles triangle**has only gottwo

**sides**of equal length and two

**angles**the same. Inaright angled

**triangle**what must the other two

**anglesaddup to**? Because all the

**angles**in a

**triangle addupto**180˚ and a Right Angled

**Triangle**has gotoneangle of 90˚.

## What does a scalene triangle look like?

**triangle**is

**scalene**if all of itsthreesides are different (in which case, the three angles arealsodifferent). If two of its sides are equal, a

**triangle**iscalled isosceles. A

**scalene**cone or cylinder is onewhoseaxis is not perpendicular to its base; opposite elementsmake”uneven” angles with the base.

## What is the formula of finding the area of an isosceles triangle?

**isosceles**right

**triangle**(two equal sides and a 90 degree angle), it is mucheasier

**tofind the area**. If you use one of the short sides asthe base,the other short side is the height. Now the

**formula**A =½ b * h simplifies to ½s

^{2}, where s isthelength of a short side.

## What is the base of an isosceles triangle?

**isosceles triangle**that has exactlytwoequal sides, the equal sides are called legs and the third sideiscalled the

**base**. The angle included by the legs iscalledthe vertex angle and the angles that have the

**base**asone oftheir sides are called the

**base**angles. The vertexoppositethe

**base**is called the apex.

## What is a scalene triangle?

**scalene triangle**is a

**triangle**thathasthree unequal sides, such as those illustrated above. SEEALSO:Acute

**Triangle**, Equilateral

**Triangle**,Isosceles

**Triangle**, Obtuse

**Triangle**,

**Triangle**.

## What are the rules of an isosceles triangle?

**Isosceles Triangle**. An

**isoscelestriangle**is a

**triangle**with (at least) two equal sides.In the figureabove, the two equal sides have length and theremaining side haslength . This property is equivalent to twoangles of the

**triangle**being equal.

## What is the third side of a isosceles triangle?

**side of an isosceles triangle**isusually referred to as the ‘base' of the

**triangle**. Whenthe

**3rd**angle is a right angle, it is called a”right

**isosceles triangle**“.

## Can the base of an isosceles triangle be the longest side?

**base of an isosceles triangle**is sometimesthe

**longest side**of the

**triangle**. Look at twoexamples.Then the angle opposite the

**base would**measure180-30-30=120degrees. This means the

**base would**be the

**longest side**of the

**triangle**.

## Are all right triangles isosceles?

No, not **all right triangles** are**isosceles**.Although it is possible to have a **righttriangle** that is an**isosceles triangle**, not **allrighttriangles**

## Can an isosceles triangle have a right angle?

**right triangle**may be

**isosceles**orscalene. In an obtuse

**triangle**, one

**angle**isgreaterthan a

**right angle**—it is more than 90 degrees.Anobtuse

**triangle**may be

**isosceles**or scalene. Inanacute

**triangle**, all

**angles**are less than

**rightangles**—each one is less than 90degrees.

## Is a 45 45 90 triangle an isosceles triangle?

**45 45 90 triangle**is a special typeof

**isosceles**right

**triangle**where the two legsarecongruent to one another and the non-right angles are both equalto

**45**degrees. Many times, we can use the Pythagoreantheoremto find the missing legs or hypotenuse of

**45 4590triangles**.

## Is a right obtuse triangle possible?

**possible**for a

**righttriangle**to also be scalene or isosceles. An

**obtusetriangle**has one

**angle**measuring more than 90º butless than 180º(an

**obtuse angle**). It may be acute,

**obtuse**,equiangular, scalene, isosceles, or equilateral, butnot a

**righttriangle**.

## How do you find the tangent of an angle?

**tangent**function, along with sine andcosine,is one of the three most common trigonometric functions. Inanyright triangle, the

**tangent of an angle**is the length oftheopposite side (O) divided by the length of the adjacent side(A).In a

**formula**, it is written simply as'tan'.

## How do we find the perimeter of a triangle?

**Perimeter**When Three Side LengthsareKnown. Remember the formula for finding the

**perimeter**ofa

**triangle**. For a

**triangle**with sides a, b and c,the

**perimeter**P is defined as: P = a + b + c.

## How do you find an angle using trigonometry?

**Find the angle of elevation of the plane from point A ontheground.**

- Step 1 The two sides we know are Opposite (300) andAdjacent(400).
- Step 2 SOHCAHTOA tells us we must use Tangent.
- Step 3 Calculate Opposite/Adjacent = 300/400 = 0.75.
- Step 4 Find the angle from your calculatorusingtan
^{–}^{1}

## How do you find the longest side of a triangle?

**longest side**of the

**triangle**.To

**find**the length of leg a, substitute the known valuesintothe Pythagorean Theorem. Solve for a

^{2}.

## What is the formula of Pythagoras?

**Pythagorean**theorem, states that the square of the length ofthe hypotenuse isequal to the sum of squares of the lengths ofother two sides ofthe right-angled triangle.