Question

problem 3
lesson 51)
complete this sentence with the best of the
choices given.
the lower (and upper) —————— of an
isosceles trapezoid are congruent.
after you pick your answer press go.
a. sides
b. base angles
c. platforms
d. diagonals
e. exterior angles

Explanation:

An isosceles trapezoid has the property that its lower and upper base angles are congruent. Sides (A) - while the non - parallel sides (legs) of an isosceles trapezoid are congruent, the question is about "lower (and upper)" which refers to angles. Platforms (C) is not a geometric term related to trapezoid properties. Diagonals (D) of an isosceles trapezoid are congruent, but the question is about "lower (and upper)" which is more characteristic of base angles. Exterior angles (E) - in general, for polygons, exterior angles have a sum property, but it's not the key property for the description "lower (and upper)" in the context of an isosceles trapezoid.

Answer:

B. base angles