Answer:
1200000
Step-by-step explanation:
The answer is 3x because 3 times 4 is 12, and 12+3=15.
7^2+8^2=113
Then square root 113 which is 10.63 to 2.d.p
So x=10.63
area of a triangle
1/2 base ×height
1/2×15×8.5
=63.75cm ^2
