23/9 - 1 1/4=47/36-1 11/36
180°-100°= 80° (angle 1)
180°-150°= 30° (angle 2)
180°-80°-30°= angle 3
angle 3 = 70°
∴ the interior angles are 80°, 30° and 70°
Answer:
area of trapezium=1/2 ×20(38+18)=560cm²
6 5/6 - 5 1/12
6 5/6 x 2
6 10/12 - 5 1/12
6-5=1
10-1= 9
( You don't subtract the 12s in subtraction)
1 9/12
Simplified
1 9/12 both divided by 3
1 3/4
Final answer 1 9/12
Simplified answer 1 3/4
Answer:
60 degrees
Step-by-step explanation:
C = 2(pi)r
The radius is 12 cm. We can find the circumference of a circle with radius 12 cm.
C = 2(pi)r = 2(3.14)(12 cm) = 75.36 cm
The length of the arc of the sector is 12.56 cm.
We can find the fraction this length is of the full circumference.
(12.56 cm)/(75.36 cm) = 1/6
The length of the arc of this sector is 1/6 the length of the circumference of the entire circle.
That means the angle of the sector is 1/6 the angle of an entire circle.
An entire circle has a central angle of 360 degrees.
1/6 * 360 degrees = 60 degrees
