Answer:(-1,-3)
Step-by-step explanation:
b ( 21 + 12) x 2
c (21 + 12) divided by 2
d ( 21 x 12) x 2
½ x 21 x 12=126
So the answer is a
Answer:
A. (21 × 12) ÷ 2
Step-by-step explanation:
Use the area formula to find the area of the triangle. A = (b × h) ÷ 2