Angles in shapes
Angles and Protractors
Coordinates
Circumference
Radius and Diameter
100
The sum of the angles in a Triangle is...
What is 180 degrees
100
What is the definition of an acute angle? Right angle? 100 Points for each correct! Next 2 teams will answer the questions...
What is acute is less than 90 degrees, right is exactly 90 degrees.
100
Show on your board where the x axis and the y axis is located
What is x is horizontal and y is vertical.
100
What is circumference? How do you find it?
What is the distance around the outside of the circle, use the formula c = pi x diameter or c = 2 x pi x radius
100
What is the relationship between radius and diamter?
What is Radius is half of Diamter or Diameter is double radius
200
The sum of the angles in a quadrilateral is...
What is 360 degrees
200
See picture 1 - the angle measures?
What is 120 degrees
200
Which coordinate comes first, second?
What is x coordiante first (across bottom) then y coordinate second (up)
200
Joe measures a tires diamter to be 15 cm. Explain the process you would follow to find the circumference.
What is multiply 15 times pi
200
If you are given a Diamter of 15 what would the radius be?
What is 7.5
300
If a triangle is equilateral what do you know about the sum of its angles and sides?
What is all angles are equal and 60 degrees, all sides are equal
300
Using picture 2. The measure of
What is 69 degrees
300
What if your coordinates are fractions, how would you make them into decimals. Show an example.
What is divide fractions and make sure to put the whole number on your decimal.
300
Suppose you need to find the circumference of a circle. All you able to measure is the radius. How would you find the circumference?
What is you double the number you know and then multiply by pi
300
If you are given a Circumference of 45, what would the Diamter be?
What is 15
400
A scalene triangle is. An isoscoles triangle is.
What is a scalene no sides are equal nor are any of the angles equal. An isoscoles has 2 sides equal with those 2 angles also equal.
400
Definition of obtuse angle? Straight angle? Give an example of where these are seen in the real world Next 3 teams will answer. 400 points each!
What is obtuse is more than 90 degrees but less than 180 degrees, straight angle is 180 degrees Examples will vary - must be reasonable.
400
See Picture 3 - What are the coordinates of Point G as a fraction?
What is (2 3/4, 1 1/4)
400
If you are given two circles, R and D, as well their radaii which is R's radius is 5 and D's radius is 10. Describe the what their circumferences would be if compared to each other.
What is Circle D's circumference would be double Circle R's. Or Circle R's circumference would be half of Circle D's.
400
Explain how you would find the Diameter and Radius of a circle if you are only given the circumference.
What is to find the Diamter you would divide the circumference given by 3 and you would divide the circumference given by 6 (or your new diameter by 2)
500
Explain the process you would follow to find the missing angles if you were given an isoscoles triangle and only knew that the top angle (in the point of the triangle) was 40 degrees.
What is you would subtract 40 from 180 to get 140 and then divide 140 by 2 since the bottom two angles opposite of each other are equal. The missing angles are each 70 degrees
500
Describe how you would use a protractor to measure and angle. How do you know which numbers to use (inside or out) How do you know your answer is reasonable.
What is you begin by placing the center or the tool on your vertex. Then you line up one of the rays of the angle on one of your bottom lines of the protractor. You then read where the second ray crosses. You start counting up at 0...so inside or out depends which ray you line up. If you classify your angle as acute, obtuse, etc.. first you will know if you answer is reasonable.
500
See picture 4 - What are the coordiantes of point C as a fraction and decimal?
What is (1 1/3, 2 2/3)
500
Explain why the formula c = pi x diamter and c = 2 x pi x radius is the same thing and will get you the same answer.
What is because if you double the radius you get diamter. So pi times diamter and pi times double radius mean the same thing.
500
Suzy measured an orange slice to have a radius of 6. Write the number sentence (expression) that Suzy would need to use in order to find the circumference of the orange slice.
What is 2 x 3 x 6
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