) In ️ABC, AD ⊥ BC, If area of ️ABC =40 sq cm , AD =5 cm then its base BC =_____________
options _
16 cm
32 cm
40 cm
46 cm
Answers
Answered by
1
Answer:
Area of triangle=1/2×l×b
40=1/2×5×b
2/5×40=b
base=2×8
16 cm
Answered by
3
Answer:
Option A
Explanation :
Given that ;
In ∆ABC
AD is perpendicular to BC
Area of the Triangle ABC = 40cm²
AD -- Height
BC -- Base
AD = 5cm
BC = ? cm
Formula :
Area of the Triangle ( A ) = 1 / 2 × bh
A = 1 / 2 × b × h
A = 1 / 2 × BC × AD
A = 1 / 2 × BC × 5
40 = 1 / 2 × BC × 5
40 = 5 / 2 × BC
40 × 2 / 5 = BC
BC = 8 × 2
BC ( base ) = 16cm
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