Pentagon is a polygon having five sides.
Therefore its perimeter = 5s = 5 × 4.9 = 24.5 cm
Therefore, the answer is D)24.5 cm
Answer:
12 ft
Step-by-step explanation:
The ladder forms a right triangle with the building and the ground, since the ground is perpendicular to the building
Therefore, we can use the Pythagorean theorem:
c2 = a2 + b2
From the information in the problem, c is 20 ft, b is 16 ft, and a is what we solve for:
(20 ft)2 = a2 + (16 ft)2
a = √((20 ft)2 - (16 ft)2) = 12 ft
Since
, you have
Since
, and
, you know that
is also positive, which means
R= 1415/314 or if you need it simplified R=4 159/314 or as a decimal R=4.50637
