The height of an equilateral triangle measure 9 CM. find its area, correct to place of decimal. take √3=1.732
Answers
Answered by
21
Heya !!!
Height of equilateral ∆ = 9 cm
✓3/ 2 × Side = 9
Side = 9 × 2 / ✓3
Side = ✓3 × 3✓3 × 2 / ✓3 = 6✓3 cm
Therefore,
Area of equilateral ∆ = ✓3/4 × ( Side)²
=> ✓3 / 4 × ( 6✓3)²
=> 1.732 / 4 × 108
=> 1.732 × 27
=> 46.764 cm².
★ HOPE IT WILL HELP YOU ★
Height of equilateral ∆ = 9 cm
✓3/ 2 × Side = 9
Side = 9 × 2 / ✓3
Side = ✓3 × 3✓3 × 2 / ✓3 = 6✓3 cm
Therefore,
Area of equilateral ∆ = ✓3/4 × ( Side)²
=> ✓3 / 4 × ( 6✓3)²
=> 1.732 / 4 × 108
=> 1.732 × 27
=> 46.764 cm².
★ HOPE IT WILL HELP YOU ★
MrJitu:
thanks
its answer is solved formula √3/4×9 answer is 3.897
Similar questions