Answer:
An equilateral triangle is a triangle in which all three sides are equal. An equilateral triangle is also equiangular, in which all three internal angles are also congruent to each other and are each 60°.
Parallelogram and rhombus possibly.
Trapezoid.
<u>Part a)</u>
Three equal sides
Three equal angles
<u>Part b)</u>
1) Rhombus
2) Parallelogram
[Both have 2 pairs of parallel sides and thus have their opposite angles equal]
<u>Part c) </u>
Trapezoid [Have exactly 1 pair of parallel sides]
The answer is $80 / $60
hope this helps youuuuu
