Answer:900,000
Step-by-step explanation:
Answer: 108 cm squared
Step-by-step explanation: To find the lateral area, you have to multiply the perimeter of the base by the height of the rectangular prism.
1. Perimeter: 10 + 10 + 8 + 8 = 36
2. Lateral area: 36 * 3 = 108
HOPE THIS HELPED YOU!
See the attached figure to better understand the problem
we know that
in the triangle ABC
tan(alfa/2)=AC/BC----> 5/3
so
(alfa/2)=arctan (5/3)---------> 59.0362°
alfa=2*59.0362--------> alfa=118.07°
alfa+beta=180°----------> because are supplementary angles
beta=180-118.07-------> beta=61.93°
the answer is
the angles are
alfa=118.07°
beta=61.93°
Answer is c brainlist if right
Remember that

So if
and
, then we know
.
Then use the Pythagorean identity to solve for cosine:
