Question

What is the length of the base of a triangle with an altitude of 7cm and an area of 49cm^2

A:42cm
B:7cm
C:21cm
D:14cm
none of the above

Answer 1

Area = (base*height)/2

A = (bh)/2

49 = (b*7)/2 ... note: altitude = height = 7 cm


Now solve that last equation for b to find the base

Answer 2

A of triangle =base x height. Since area and height is given, so just substitute in the equation to get length of the base.

A=bxh
49=b x 7
49/7 (making b the subject of the formula)=7cm, which is the length of the base of the triangle.

Answer 3

its A =bxh
49=bx7
Making b the subject of the formula, so it will be 49/7 which will be 7cm, as the length of the base of the triangle

Answer 4

7 wasnt the right answer, 14 was i guess you take 49/7 and then multiply by 2and you get 14

Answer 5

Sancy used the wrong formula to get the wrong answer of 7. Use the formula I posted above.

Answer 6

@jim_thompson5910 i did go back and redo the problem with your formula and it worked thanks

Answer 7

that's great, yw