Triangles 15.2

An isosceles triangle has how many congruent sides?

• 1

• 2

• 3

The measure of each angle of an acute triangle must be —

• equal 90°

• less than 90°

• total 360°

• more than 90°

Why is the triangle classified as isosceles?

• All angles are acute

• Exactly two sides are congruent

• All three sides are congruent

• All angles are congruent

Bella has a window in her bedroom shaped like a triangle. Each angle of the triangle measures less than 90 degrees. What kind of triangle is her window?

• Straight

• Acute

• Obtuse

• Right

Which triangle can best be described as an equilateral triangle?

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Jessica drew the triangle. Which of the following best describes this triangle?

• This is an obtuse isosceles triangle.

• This is an acute triangle.

• This is a right isosceles triangle.

• This is an equilateral triangle.

Which statement is true about group A?

• The triangles are all equilateral.

• The triangles are all acute triangles.

• The triangles are all scalene.

• The triangles are all obtuse triangles.

Which words best describe this triangle?

Select two.

• Right

• Acute

• Obtuse

• Isosceles

• Scalene

Identify all the correct terms to describe the triangle shown.

Select two.

• Obtuse

• Equilateral

• Isosceles

• Right

• Acute

Which triangle can best be described as an isosceles triangle?

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