Triangle ABC is right angled at A, ,AD is perpendicular to BC. Find the length of AD.if AB =9 cm BC = 15 cm and AC = 12 cm.
Answers
Answered by
0
by using herons formula s=15+12+9/2=18
√18(18-15)(18-9)(18-12)
√18(3)(9)(6)
√9x2x3x3x3x3x2
3x2x3x3
54cm^2
1/2 x basexheight = 54
1/2x15xheight =54
height=54x2/15
height=7.2 cm
Similar questions