Quiz 3.3 to 3.6 Review

An isosceles triangle __________ has exactly two congruent sides.

• sometimes

• always

• never

A conclusion reached by deductive reasoning is __________ true if the hypotheses are true.

• always

• sometimes

• never

A 17-sided convex polygon is __________ equiangular.

• sometimes

• always

• never

A conclusion based on several past observations is __________ true.

• sometimes

• always

• never

The sum of the measures of the exterior angles of any convex polygon, one at each vertex, is __________.

• 360°

• 180°

• 540°

• 720°

The sum of the measures of the acute angles of a right triangle is __________.

• 90°

• 180°

• 60°

• 120°

The sum of the measures of the angles of a convex polygon with n sides is __________.

• (n-2) × 180°

• (n+2) × 180°

• n × 180°

• (n-1) × 180°

Each angle of an equiangular quadrilateral has measure __________.

• 90°

• 60°

• 120°

• 100°

Find the value of x.

Mathematical Equivalence

ON

Find the value of x and y.

• x = 20°, y = 110°

• x = 40°, y = 90°

• x = 30°, y = 100°

• x = 60°, y = 70°