The absolute value is the distance from 0, so it would be 4 and -4
Is this question correct ?
If you think about it, an octagon is made up of 8 triangles. So you first find the area of one triangle then multiply it by 8 for the total area:
A=1/2bh
A=1/2(9.9)(12)
A=59.4
59.4 x 8= 475.2
Therefore the total area for the octagon should be 475.2 units^2
Hope this helps !
The answer is A) Right because the lengths 3 cm and 3 cm are obviously the same so it will form a right angle