Answer:
a +d = a2
Step-by-step explanation:
-2 - (-9) =
-2+9=7
a + d = a2
In parallelogram the opposite sides are equal. Therefore we have the equation:

In the parallelogram, the sum of measures of the angles at one side is 180°. Therefore we have the equation:

Answer:
c = a + b → c = 7 + 7 = 14
A. 14
Divide the area of the oven tray by the area of the cake tin.
5 * 8r = 40r
3 * 4r = 12r
40r + 12r = 52r
Solution: 52r