9. An isosceles triangle has its base of 20 cm and each of its equal sides is 26 cm long
Find out : (i) its height, (ii) its area.
Answers
Answered by
4
Answer:
(i) h = 16.61 cm
(ii) area = 166.1 cm²
Step-by-step explanation:
(i)
(height of triangle)² = (26)² - (20)² ( by Pythagoras)
(h)² = 676 - 400
h = √276
h = 16.61 cm
so,
(ii) Area of triangle = 1/2( b × h )
= 1/2 ( 20 × 16.61 )
= 166.1 cm²
Answered by
6
Answer:
(i)Height:
Consider an Isosceles triangle with
Draw a perpendicular on non-congruent side
In an Isosceles triangle a perpendicular bisects then non-congruent side
Hence,
In
(ii)Area:
First find out It's height by Pythagoras theorem,
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