10 because x+x = 20
a+b=c
The rectangular prism has an area of 1188.
The height would be 13.5in
Answer:
wheres the question?......
It is a quadrilateral where both pairs of opposite sides are parallel. Parallelogram. There are six ... In an isosceles trapezoid the diagonals are always congruent. The median of a trapezoid is etc. learn more in https://www.mathplanet.com
