Please brainliest this what Siri said
Answer:
423 cm^2
Step-by-step explanation:
Area of a regular pentagon = Pa/2, where P = the perimeter and a = the apothem.
We can find the perimeter by
P = 5s where s is the side length since the pentagon is regular
P = 5( 14.1)
P = 70.5
A = P*a/2
= 70.5 ( 12)/2
=423 cm^2
Answer:
1.04
Step-by-step explanation:
8.04 - 7 = 1.04
I hope this helps!
Answer:
48%
Step-by-step explanation:
Express 840 as a fraction of 1750 and multiply by 100%, that is
percent = 
× 100%
= 
= 48%
Answer:
x = 25
Step-by-step explanation:
The interior angle adjacent to the 123° angle is supplementary to it.
Its measure is 180° - 123° = 57°
The sum of the measures of the interior angles of a polygon is
(n - 2)180° = (4 - 2)180° = 2(180°) = 360°
3x + 7 + 96 + 5x + 57 = 360
8x + 160 = 360
8x = 200
x = 25
