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The perimeter of any triangle is the sum of its 3 sides.

Q: What is the perimeter of a isosceles right triangle?

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If the base of an isosceles triangle is 11 and its perimeter is 39, then it has a height of 12.87.

No. An isosceles right triangle is a special case. There are many right triangles which are not isosceles.

It is the sum of the lengths of its sides.

A right angled isosceles triangle!

Perimeter of the isosceles triangle: 16.2+16.2+8.1 = 40.5 cm

Related questions

If the base of an isosceles triangle is 11 and its perimeter is 39, then it has a height of 12.87.

A right triangle and an isosceles triangle have the fact that they are both triangles in common. A right triangle can also be an isosceles triangle.

A triangle that has one right angle and is isosceles is called an isosceles right triangle.

No. An isosceles right triangle is a special case. There are many right triangles which are not isosceles.

If you mean "isosceles" triangle, the perimeter is the sum of twice the known side plus the base.

It is the sum of the lengths of its sides.

An isosceles triangle has two equal sides and two equal angles. A right triangle is any triangle with one angle that is a right angle. A right triangle could also be an isosceles triangle, but an isosceles triangle will not always have a right angle.

An isosceles triangle has two equal sides and two equal angles. A right triangle is any triangle with one angle that is a right angle. A right triangle could also be an isosceles triangle, but an isosceles triangle will not always have a right angle.

A right angled isosceles triangle!

It can be. If two of the sides of a right triangle are the same length then it is an isosceles triangle

I don't see any isosceles triangle below.In general, the perimeter is the sum of the lengths of all sides. Note that in an isosceles triangle, two of the three sides have the same length.

Not normally but if it has angles of 90, 45 and 45 degrees it is then both a right angle and an isosceles triangle