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CBSE Class 10 Answered

If🔺ABC and 🔺BDE are the equilateral 🔺s, where D is the mid point of BC, find the ratio of areas of 🔺ABC and 🔺BDE.
Asked by guptaabhinav0809 | 17 Nov, 2018, 11:07: PM
answered-by-expert Expert Answer
Area of equilateral triangle of side a = (√3/4)a2 . Hence area of equilateral triangle is proportional to square of its side;
 
if side of equilateral ΔABC is a, then side of equilateral ΔBDE is a/2 . 
 
Hence area ratio of ΔABC : ΔBDE = 1 : (1/4)   or  4:1
Answered by Thiyagarajan K | 18 Nov, 2018, 11:41: AM
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