edog7755
20.03.2021 •
Mathematics
Which expression is equivalent to 4/9×2?
2x 9/2
4x2/9
2x2/9
4x9/2
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Ответ:
Ответ:
is b
Step-by-step explanation:
Ответ:
Step-by-step explanation:
Surface area = lateral area + 2(area of base)
Lateral area = perimeter of base * height.
Because it is a isosceles right triangle, both sides are equal.
= 72
2 = 72. Divide both sides by 2
= 36. Square both sides.
x = 6.
So the perimeter of the base = 6 + 6 + = 20.485281374239
Lateral area = 20.485281374239 * 7 = 143.397
Area of base is (1/2)base * height.
(1/2)(6)(6) = 18
Using the surface area formula
surface area = 143.397 + 2(18) = 179.4