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.

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 measure 60°.

Front

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

Back

The sum of the interior angles of any triangle is always 180°.

Front

If two angles of a triangle are equal, what type of triangle is it?

Back

It is an isosceles triangle.

Front

What is the measure of each angle in an equilateral triangle?

Back

Each angle in an equilateral triangle measures 60°.

Front

How do you find the length of the base of an isosceles triangle if the two equal sides are known?

Back

Use the Pythagorean theorem or properties of triangles to calculate the base length.

Front

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

Back

In an isosceles triangle, the angles opposite the equal sides are also equal.

Front

If the length of one side of an equilateral triangle is 10, what is the perimeter?

Back

The perimeter is 30 (10 + 10 + 10).

Front

What is the formula for the area of a triangle?

Back

Area = 1/2 * base * height.

Front

In an isosceles triangle, if the equal sides are 5 cm each and the base is 6 cm, what is the height?

Back

The height can be found using the Pythagorean theorem, which gives approximately 4.33 cm.