Answer:
-8
Step-by-step explanation:
(7)*(-8) = -56
(-56) - (-8) = -48
1. You will have to find the height first which could be done by using pythagoras theorem
split the 12 by half giving 6
a^2 = b^2 + c^2
13^2 = 6^2+c^2
169 = 36+c^2
c^2=169-36
c^2=133
c=sqrt133
c= 11.53
area of triangle
1/2 x b x h
1/2 x 6 x 11.53
34.59
34.5(3 sf)
Any transformation involving change of scale will not result in a congruent figure. Rotations and reflections and translations maintain congruence.