Answer:
trapezoid area = ((sum of the bases) ÷ 2) • height
trapezoid area = ((6 + 12) / 2) * height
trapezoid area = 18 / 2 * height
height = 99/9 = 11
Step-by-step explanation:
Answer:
25
Step-by-step explanation:
25 25
3y+21+8y
11y+21 is the answer
The original angle id 90 degrees so subtract the 45 degrees.
Answer: 45 degrees
