calculate X.
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Answered by
1
Answer:
the middle line is 12 and it is also perpendicular bisector to X.
so, use Pythagoras theorem....
(X/2)^2 + 12^2 = 15^2.
X^2/4 + 144 = 225.
X^2/4 = 225-144 = 81
X^2 = 81×4.
X = √81×4 = 9×2 = 18.
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Answered by
1
Answer:
18
Step-by-step explanation:
in the triangle opposite sides are eq.
therefore opposite angles are equal
so both the triangles are congruent
by SAS criterion
therefore by pythagoras therom
15² = 12² +(x/2)²
225 = 144 + x²/4
225-144=x²/4
x²/4=81
x²=81×4
x=9×2
x=18
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