Remark
A cyclic quadrilateral is one whose vertices touch the circumference of a circle. It has the strange property that opposite angles add up to 180 degrees. "b" is opposite a 110o angle. Therefore b = 180 - 110 = 70 degrees.
Answer B
Try it and see look In the corner
Answer:
3.75cm 44.16cm²
20cm 314cm²
42cm 1384.74cm²
Step-by-step explanation:
Area of a circle = πr²
Where : = π = pi = 3.14
R = radius
the diameter is the straight line that passes through the centre of a circle and touches the two edges of the circle.
A radius is half of the diameter
16. Radius = 7.5 / 2 = 3.75
Area = 3.14 x 3.75² = 44.16
17. Diameter = 10 x 2 = 20
Area = 10² x 3.14 = 314
18. Diameter = 21 x 2 = 42
Area = 21² x 3.14 = 1384.74
Add two lines:
2y = -26
y = -13
Substitute this back into first equation:
4x - 2 (-13) = -2
4x + 26 = -2
4x = -28
x = -7
Answer: 7 more than a number
Step-by-step explanation:
7 more than means + 7
decrease of 7 means -7
descend means down, which means -7
product of a number and 7 means 7 * a number
