Answer:
9. 108 cm^2 or B
10. 1,080 m^2 or B
Explanation:
9.
A=ah+bh+ch+1
2﹣a4+2(ab)2+2(ac)2﹣b4+2(bc)2﹣c4=3·8+4·8+5·8+1
2·﹣34+2·(3·4)2+2·(3·5)2﹣44+2·(4·5)2﹣54
= 108
10.
A=ah+bh+ch+1
2﹣a4+2(ab)2+2(ac)2﹣b4+2(bc)2﹣c4=15·24+8·24+17·24+1
2·﹣154+2·(15·8)2+2·(15·17)2﹣84+2·(8·17)2﹣174
= 1080