Isosceles and Equilateral triangles practice

Front

What is an isosceles triangle?

Back

An isosceles triangle is a triangle that has at least two sides of equal length and the angles opposite those sides are equal.

Tags

CCSS.4.G.A.2

Front

What is an equilateral triangle?

Back

An equilateral triangle is a triangle in which all three sides are of equal length and all three angles are equal, each measuring 60 degrees.

Tags

CCSS.4.G.A.2

Front

What is the sum of the interior angles of a triangle?

Back

The sum of the interior angles of a triangle is always 180 degrees.

Tags

CCSS.8.G.A.5

Front

If two angles of a triangle are equal, what can be said about the sides opposite those angles?

Back

The sides opposite the equal angles are also equal in length.

Tags

CCSS.8.G.A.5

Front

In an isosceles triangle, if the vertex angle measures 36 degrees, what is the measure of each base angle?

Back

Each base angle measures 72 degrees.

Tags

CCSS.8.G.A.5

Front

How do you find the length of a side in an isosceles triangle given the lengths of the other two sides?

Back

Use the properties of isosceles triangles and the Pythagorean theorem if applicable.

Tags

CCSS.HSG.CO.C.9

Front

What is the relationship between the angles and sides in an equilateral triangle?

Back

In an equilateral triangle, all sides are equal, and all angles are equal to 60 degrees.

Tags

CCSS.4.G.A.2

Front

If the length of one side of an equilateral triangle is 8, what is the perimeter?

Back

The perimeter is 8 + 8 + 8 = 24.

Tags

CCSS.3.MD.D.8

Front

What is the formula for the area of a triangle?

Back

The area of a triangle is given by the formula: Area = 1/2 * base * height.

Tags

CCSS.6.G.A.1

Front

If the base of an isosceles triangle is 10 and the height is 5, what is the area?

Back

The area is 1/2 * 10 * 5 = 25.

Tags

CCSS.6.G.A.1