Question

find bc if area of the triangle abc is 42cm2 and height AD is 4 cm.​

Answer 1

Answer:

$\frac{1}{2} \times bc \times ad \\ 42 = \frac{1}{2} \times bc \times 6 \\ 42 = 3 \times bc \\ bc = \frac{42}{3} \\ bc = 14$

$ㄚ◊ㄩЯ \: \: ∆иῳ∑Я \\ 14cm$