Question

The base of a triangle is 6 cm. more than twice its height. If the area of the triangle is 810 square cm.. what is the height?

A: 27
B: 21
C: 18
D: 9

Answer 1

Answer:

b = 2h + 6cm

Area = 810cm²

=(1/2)b×h=810cm²

=(1/2)(2h+6)h=810

=(1/2)2h²+6h=810

=h²+3h-810=0

=h²+(30-27)h-810=0

=h²+30h-27h-810=0

=h(h+30)-27(h+30)=0

=(h+30)(h-27)=0

either h+30=0 or h-27=0

h=-30 or h=27

h=-30 is ignored.

So, height is 27 cm

A is the correct option

Answer 2

Answer:

OWIFE

Step-by-step explanation:

WQFE W