Step-by-step explanation:
area = n * a * ri / 2 , having ri - incircle radius (it's also an apothem - a line segment from the center to the midpoint of one of its sides) area = perimeter * ri / 2 , given ri and polygon perimeter.
Answer:
the answer is option (B)
No
Yes
Answer:2/1
BC = 11
using the sine ratio in the right triangle and the exact value
sin45° = , then
sin 45° = = = = ( cross- multiply )