Answer:
Step-by-step explanation:
V = 1/3 pi r^2 h Multiply both sides by 3
3V = pi r^2 h Divide by pi * h
= r^2 Take the square root
= r
Given: PSTK is a trapezoid, m∠P=90° SK =13, PK = 12, ST=8 Find: The area of PSTK.
1 answer:
<h3>Given</h3>
trapezoid PSTK with ∠P=90°, KS = 13, KP = 12, ST = 8
<h3>Find</h3>the area of PSTK
<h3>Solution</h3>It helps to draw a diagram.
∆ KPS is a right triangle with hypotenuse 13 and leg 12. Then the other leg (PS) is given by the Pythagorean theorem as
... KS² = PS² + KP²
... 13² = PS² + 12²
... PS = √(169 -144) = 5
This is the height of the trapezoid, which has bases 12 and 8. Then the area of the trapezoid is
... A = (1/2)(b1 +b2)h
... A = (1/2)(12 +8)·5
... A = 50
The area of trapezoid PSTK is 50 square units.
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Answer:
7
Step-by-step explanation:
The area for a parallelogram is given by the following formula:
Where b is the base and h is the height.
We already know the area is 28 and the height is 4. So, substitute:
Divide both sides by 4:
So, the base length is 7.
Our answer is 7 :)