20. Find the area of a circle inscribed in a 9-12-15 triangle. (Hint: What kind of triangle is this?)

Question

20. Find the area of a circle inscribed in a 9-12-15 triangle.
(Hint: What kind of triangle is this?)

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Adeline 10 hours 2021-09-14T21:36:03+00:00 2 Answers 0

Answers ( )

    0
    2021-09-14T21:37:51+00:00

    Answer:

    Step-by-step explanation:

    0
    2021-09-14T21:38:02+00:00

    Answer:

    A = 176.7 units²

    Step-by-step explanation:

    Put the hint to use.  Do these side lengths reflect the Pythagorean Theorem?  

    9^2 + 12^2 = 15^2?

    81 + 144 = 225?  YES

    Therefore, this is a right triangle, and the diameter is 15 units.

    Thus, the radius is 15/2 units, and the area is A = πr², or

    A = π(15/2 units)² = (225/4)π units².  Using 3.14 for π, we get:

    A = 176.7 units²

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45:7+7-4:2-5:5*4+35:2 =? ( )