Answer:
36 cm
Step-by-step explanation:
The formula to find the area of a triangle is A=1/2bh where b stands for base and h for height.
So, 8 times 9 equals 72, and 72 divided by 2 is 36.
Apply law of total resistance in parallel circuit
i think A=20
A=pq/2 =4·10/2 =20
Hope i helped
-lvr