Answer:
A
Step-by-step explanation:
Answer:
2x^2 + 10x
Step-by-step explanation:
The hinge theorem. Just think of the two sides being connecting by a "hinge"
Just simply use the calculation of a trapazium.
[ (6+7) + 21 ][6]
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2
that's the formula of a trapazium. add the top length and bottom length, multiply it by the height and divide all of them by 2.
now the answer should be A, 102.
216 degrees.
360 - 144 = 216.
