Step-by-step explanation:
tan x =opp/adj
x = tan-¹(8/20)
x =21.8 degree
but you are asked to find the angle of elevation so
angle of elevation + 21.8 + 90 = 180 degree .... basic rule of triangle
angle of elevation=180-90-21.8
angle of elevation=68.2 degree
Answer:
Yes, the number is 9.
Step-by-step explanation:
81 is 9², and 90 is their sum.
Area of Parallelogram= base * height
A= (12 3/4)(2 1/2)
A= (51/4)(5/2)
A= 255/8
A= 31 7/8
OR
A= (12.75)(2.5)
A= 31.875
Hope this helps! :)
Answer:i need more explaining
Step-by-step explanation: