Fractions of a Circle
1/4 of a circle is shaded. How many degrees is the angle?
90
When the bottom line is pointing to the left, we must use the _________________ .
outside numbers
Alexa drew two angles that create a straight line when they are combined. One angle measures 74 degrees. What is the missing angle's degree?
106 degrees
Solve: 24 x 103
Estimation: 24 x 100
Is the estimation reasonable? WHY OR WHY NOT?
24 x 103 = 2,472
24 x 100 = 2,400
Yes, because when you round 2,472 to the next thousand you would get 2,400
Which is the better estimate for the length of a kitchen table, 200 centimeters or 200 meters?
200 meters
2/5 of a circle is shaded in. What degree is the angle shaded?
144
When the bottom line is pointing to the right, we must use the _________________ .
inside numbers
Joshua wants to draw a straight line by creating two angles. One angle measures 142 degrees. What must the other angle measure to complete his drawing?
38 degrees
ESTIMATE : 49 x 25
50 x 30 = 1,500
50 x 20 = 1,000
Gema wants to weigh her cat and measure its standing height. Which two units should she use?
Weight = Pounds
Height = Feet
How many degrees are in a circle?
A) 45 degrees
B) 115 degrees
C) 90 degrees
B) 115 degrees
How many degrees is in a straight line?
180 degrees
ESTIMATE: 536 × 8
SOLVE: 536 X 8
Estimation: 540 x 8 = 4,320 OR 500 x 8 = 4,000
Solve: 4,288
What unit would you use to measure the weight of a book shelf?
Pounds
Obtuse Angle
Joanna drew two angles that equal 90 degrees. Which two angles did she draw?
A) 45 degrees and 45 degrees
B) 73 degrees and 29 degrees
C) 50 degrees and 30 degrees
A) 45 degrees and 45 degrees
3 angles have a combined measure of 285°. Two of the angles measure 75°and 120°.
Write an equation to find the measure of the third angle.
285 = 75 + 120 + x
ESTIMATE AND SOLVE
473 x 11
470 x 10 = 4,700
473 x 11 = 5,203
What unit would you use to measure the amount of liquid a water bottle holds?
Ounces