Find the area of triangle abc in which bc=8cm,ac=15cm and ab=17cm .Find the length of altitude drawn on ab
Answers
Answer:
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Answer:
AREA = 60 CM
ALTITUDE = 15 CM
Step-by-step explanation:
AB = 17 CM
BC = 8 CM
AC = 15 CM
PERIMETER = AB +BC+AC
= 17+8+15
= 40CM
SEMI PERIMETER =40/2
= 20CM
AREA OF TRIANGLE = √S (S-AB) (S-BC) (S-AC)
= √20 (20-17) (20-8) (20-15)
=√ 20 *3*12*5
= √2*2*5*3*3*2*2*5
=2*2*3*5
= 60 CM
AREA OF TRIANGLE = 1/2 *B *H
60 = 1/2 * 8 *H
60 = 4H
H = 60/4
H 15CM
ALTITUDE =15 CM