Answer:
Step-by-step explanation:
You correct
Answer:
256
Step-by-step explanation:
volume of the triangular pyramid = 1/3(area of triangle)height
1/3 (1/2bh)h
1/3(1/2x 8x16)12
4(4x16) = 4(64) = 256
3b

-15b is equivalent to the equation shown above.
Answer:
x= 78
Step-by-step explanation:
Focus on the blue traingle:
∠BHI= 180° -47° -31° (∠sum of triangle)
∠BHI= 102°
x°= 180° -102° (adj. ∠s on a str. line)
x°= 78°
x= 78
<u>Alternatively</u><u>,</u>
x°= 47° +31° (ext. ∠ of triangle)
x°= 78°
x= 78