romanbattistelli23
13.01.2020 •
Mathematics
Find the area of the regular pentagon.
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Ответ:
A = 1/4 √5(5+2√5) a² ; a = side
A = 1/4 * √5(5+2√5) * 8²
A = 1/4 * √5(5+2(2.24) * 64
A = 1/4 * √5(5+4.48) * 64
A = 1/4 * √5(9.48 * 64
A = 1/4 * √47.4 * 64
A = 1/4 * 6.88 * 64
A = 1/4 * 440.32
A = 110.08 cm²
Ответ:
find the slope: m=(-4-6)/[(0-(-2)]=-5
So you have y=-5x+b
next, find the y intercept b.
the y intercept is when x=0. in this case, the y intercept is -4
so y=-5x-4