Angles, Decimals, Fractions & Percentages Flashcards
What angle is equal to 90 degrees
Right Angle
What angle is less than 90 degrees?
Acute Angle
What angle is more than 90 but less than 180 degrees?
Obtuse Angle
What type of angle adds up to 90 degrees?
Complementary Angle
What angle is adds up to 180 degrees?
Supplementary Angle
What angle equals both sides?
Vertically- Opposite Angle
How do you change a fraction into a percentage?
Divide the bottom number into the top number then change the answer into a percentage.
OR
See what number makes 100 if it’s in NOT out of 100. Then multiply the top and the bottom number with the same number then turn it into a fraction and write the top number in a percentage.
How do you change a decimal to a fraction?
You have to look at the last digit to see its place value. then change the decimal into a fraction. See what number goes into the top and bottom number, then divide it.
0.3 x 7=
2.1
11 + 0.10 + 1.0 + 0.11
12.21
3/100 =
0.03
25/20=
1.25
Angle at point adds up to
360 degrees
Alternate angle are
Equal when lines are parallel
Corresponding angles are
Equal when lines are parallel
Co-interior angles add up to
180 degrees
What is a POINT?
A line is labeled with a capital letter
What is a RAY?
It is a part of he line with one end point ‘A’ and passing through point ‘B’.
A triangle adds up to
180 degrees
A irregular square adds up to
360 degrees
How do you add and subtract decimals
Keep the decimal point underneath each other
How do you multiply decimals?
RULE
The number of digits after decimal point in the answer has to equal the number of digits in the questions
HOW TO DO
When multiplying by 10s 100s 1000s you move the decimal point to the right for how many 0s there are
How do you divide decimals?
RULE
Keep dividing till it terminates or recurs
HOW TO DO
When dividing by 10s 100s 1000s you move the decimal points the left for each 0
