MATH --- Chapter 8: 2D Figures REVIEW (30)

Which figure appears to be a right triangle?

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Which of the following best describes the triangle?

• right

• equilateral

• isosceles

• scalene

The triangle shown is

• right

• equilateral

• isosceles

• scalene

Alli measured the angles of a triangle on a stained glass window as 25°, 25°, and 130°. What type of triangle did Alli measure?

• equilateral

• isosceles

• right

• scalene

Which of the following could be the lengths of a scalene triangle?

• 12, 12, 12

• 12, 10, 8

• 10, 10, 6

• 12, 9, 9

Which statement is true about equiangular triangles?

• • The angles measure 30°, 60°, and 90°.

• • Two sides are equal in length, and one angle measures 90°.

• • All sides are equal in length, and all angles have the same measure.

• • All angles have the same measure, and two sides are not equal in length.

Which words best describe the triangle?

• acute and scalene

• acute and isosceles

• obtuse and scalene

• obtuse and isosceles

Which triangle best represents the description below?

The length of one side of an acute triangle is 2 times the length of another side.

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Ella Kate drew the isosceles triangles below for a class assignment.

What property do these triangles share that makes them all isosceles triangles?

• All the triangles contain an obtuse angle.

• All of the angles of the triangles are acute.

• Two sides of each triangle are the same length.

• No two sides of the triangles are the same length.

Which angle has the smallest measure?

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