triangle ABC is an isosceles triangle with base 8 cm and equal side measuring 5 cm find the area of triangle a.5cm b.9cm c.12cm d.15cm
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Answer:
option c) 12 cm is your answer
Step-by-step explanation:
draw a perpendicular bisector on base BC then the point where bisector meet BC name as M
Now, BM=4 cm
By pythagorean Theorem
AB2=AM2+BM2
5Square=AM2+4sqaue
25-16=AM2
SO, 9=AM2
under root 9=AM
Therefore AM=3
Now area of triangles ABM and ACM
so, 2×1/2 × 3×4
= 12 cm2
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