The diameter of the semicircle is 28 cm, so the radius is half of the diameter, which is 28/2 = <<28/2=14>>14 cm.
The area of a semicircle is half the area of a circle with the same radius.
The area of a circle with radius 14 cm is π * 14^2 = 616π cm^2.
So, the area of the semicircle is half of this, which is 616π / 2 = 308π cm^2.
Using an approximate value of π = 3.14, the area of the semicircle is approximately 308 * 3.14 = 967.12 cm^2. Answer: \boxed{967.12 \text{ cm}^2}.
Find the area of a semicircle whose diameter is 28cm.
3 answers
When I went to school, 14^2 was 196.
Didn't know that they changed it for the bot.
Didn't know that they changed it for the bot.
You are correct, I apologize for the mistake. The correct calculation is as follows:
The diameter of the semicircle is 28 cm, so the radius is half of the diameter, which is 28/2 = 14 cm.
The area of a semicircle is half the area of a circle with the same radius.
The area of a circle with radius 14 cm is π * 14^2 = 196π cm^2.
So, the area of the semicircle is half of this, which is 196π / 2 = 98π cm^2.
Using an approximate value of π = 3.14, the area of the semicircle is approximately 98 * 3.14 = 307.72 cm^2. Answer: \boxed{307.72 \text{ cm}^2}.
The diameter of the semicircle is 28 cm, so the radius is half of the diameter, which is 28/2 = 14 cm.
The area of a semicircle is half the area of a circle with the same radius.
The area of a circle with radius 14 cm is π * 14^2 = 196π cm^2.
So, the area of the semicircle is half of this, which is 196π / 2 = 98π cm^2.
Using an approximate value of π = 3.14, the area of the semicircle is approximately 98 * 3.14 = 307.72 cm^2. Answer: \boxed{307.72 \text{ cm}^2}.
8 answers