Lines in a circle
What do you call a line that joins two points on the circumference and passes through the center of the circle?
Diameter
Triangle EFG is similar to Triangle PQR. Angle F corresponds to which angle?
Angle Q
The three angles in a triangle are 34, 85, x. Find the value of x.
61 degrees
What is the formula for the area of a circle?
pi r squared
What does an equation have that an expression doesn't have?
equal sign
This line joins two points on the circumference and does NOT pass through the center of the circle.
Chord
Triangle EFG corresponds to Triangle to LMN.
Side EG corresponds to side?
Side LN
What do you call two angles added together that equal 180 degrees?
supplementary
What value is Pi?
3.14
5m - 8 = 2
m = 2
What has two radii and an arc?
sector
Angle Y (m - 8) is congruent to Angle M (25 degrees).
Find the value of m.
33 degrees
Two supplement angles are 3y + 4 and 32 degrees. Find the value of y.
48 degrees
The circle's diameter is 14 cm. Calculate its circumference.
43.96 cm
12 - 6y = 36
y = -4
complete: 1 diameter = 2 what ?
2 radii
Angle L - 2(2k + 4) corresponds to Angle K ( 20 degrees)
Find the value of k?
3 degrees
Two lines intersect. What is interesting about vertical angles?
they are equal
200.96 squared cms
3m + 6 = 4m - 2
m = 8
1. What is the only line that is outside the circle
2. What line starts at a point on the circumference, and intersects the circle on the other side?
tangent
secant
Side MN ( 4y ) corresponds to side PQ (8 cm )
Side LM ( 5 cm) corresponds to side QR (10 cm)
y = 1 cm
There are 5 angles around a point. They measure 79, 36, 48, 100 degrees. Find the measure of the missing angle.
97 degrees
A circle with a diameter of 12 cm is drawn. Another circle, with a radius 4 times bigger than the first circle is drawn. Calculate the circumference of the second circle.
150.72 cms
The area of a circle is 36.2984 cm squared. Calculate the diameter of the circle.
6.8 cm