Lets say pi is 3.14
The area of a circle is: pi*radius squared
The radius is half the diameter so it is 5 inches.
3.14*5 squared 2
3.14*25
78.5inches squared
Answer:
110°
Step-by-step explanation:
m arc DB=140°
m arc BCD=360-140=220°
∠ A=1/2×220=110° (∵angle at the circumference=1/2 angle at the center.)
Answer: perimeter: 30 in. Area: 221 in
Step-by-step explanation:
Answer:
Obtuse triangle
Step-by-step explanation:
<em>The longest side of the triangle is 26 in, so that will be the hypotenuse</em>.
By an extension of the Pythagorean theorem:
- <em>Right triangle: a² + b² = c²</em>
- <em>Acute triangle: a² + b² > c²</em>
- <em>Obtuse triangle: a² + b² < c²</em>
Where a and b are the legs, and c is the hypotenuse.
Plug in: 3.5² + 25² ₙ 26²
Powers: 12.25 + 625 ₙ 676
Add: <em>637.25 < 676</em>.
That means that this triangle is obtuse.
Answer:
x=65°
Step-by-step explanation:
