Topic 15 Practice Test

Which of the following correctly describes the triangles shown?

• Both triangles have a right angle

• Only one triangle has an acute angle

• Both triangles have at least two obtuse angles

• Both triangles have at least two acute angles

A right triangles has an angle whose measure is 35°. What is the measure of the third angle in the triangle?

• 35°

• 55°

• 72.5°

• 125°

Which of the following can be used to describe the square below?

• Opposite sides are perpendicular

• All angles are obtuse

• Adjacent sides are parallel

• All sides are the same length

This quadrilateral has one pair of parallel sides. What is it?

• Square

• Trapezoid

• Rhombus

• Rectangle

Sabrina's glasses have lenses that are the shape shown in the picture below. Which of the following could NOT be used to describe the lenses?

• Quadrilateral

• Regular Polygon

• Hexagon

• Opposite sides parallel

A sail on a sailboat is a triangle with two sides perpendicular and each side is a different length. What are the two terms that could be used to describe the sail?

• right

• obtuse

• acute

• equilateral

• scalene

The necklace charm shown has one pair of parallel sides. Tara says the charm is a parallelogram. Lisa says it's a trapezoid. Who is correct? Why?

• Tara, two sets of sides are parallel

• Tara, one set of sides are parallel

• Lisa, two sets of sides are parallel

• Lisa, one set of sides are parallel

Which best describes the polygon?

• regular triangle

• regular quadrilateral

• irregular triangle

• irregular quadrilateral

Simon says that if a triangle is classified as a scalene triangle, it must also be an acute triangle. Do you agree or disagree, why?

• Agree, scalene triangles have to have all equal angles

• Agree, scalene triangle can't be right or obtuse

• Disagree, scalene triangles can be right or obtuse

• Disagree, scalene triangles can only be obtuse

Select all the attributes of a square.

• one pair of parallel sides

• two pairs of parallel sides

• four right angles

• four sides of equal length