Answer:
19. 6
20. 70
21. 13
Step-by-step explanation:
If a and b represent the height and base of the triangular face, and h represents the length of its hypotenuse, and w represents the width or thickness of the prism, the surface area (A) is
.. A = ab +w*(a +b+ h)
Of course the area of each triangle is (1/2)ab, but there are two of them, so their total area is ab.
Put in the numbers and do the arithmetic. If you have a lot of them all specified in this way, a spreadsheet can make short work of it.
A = 5*12 +4*(5 +12 +13) = 160 . . . square inches
Answer:
20= 48
21. 128
22. 200
Step-by-step explanation:
number 20 the 4mm is halfway so its 8 and 6x8=48
number 21 8x16=128
number 22 the ten is 1/4th of the portion of the pyramid if there's 4 10s than that = 40 and 40x5=200
Answer:
Your answer is (6x−1)(3x−2)
Step-by-step explanation:
