8th Rational #'s, squares, cubes, Pythagorean Theorem Flashcards
What are the 4 types of rational numbers?
- integers. 2. terminating decimals. 3. repeating decimals. 4. fractions that turn into repeating or terminating decimals
What is an irrational number?
a decimal that goes on forever without a pattern
Pythagorean Theorem is for what type of triangle?
right triangles
What is the Pythagorean Theorem formula?
a^2 + b^2 = c^2
How do you know if 3 side lengths make a triangle?
You know 3 sides make a triangle if when you add any 2 sides it is bigger than the 3rd side.
How do you know if 3 side lengths make a right triangle?
You know 3 sides make a right triangle if you plug numbers into Pythagorean Theorem formula and it is true.
The last step to solving the Pythagorean formula is always….
The last step to solve the Pythagorean Theorem formula is always square root
When finding A or B in a right triangle, do you add or subtract the squares of the other sides?
When finding side A or B in a right triangle you subtract the squares of the 2 other sides.
When finding C in a right triangle do you add or subtract the squares of the other sides?
When finding side C in a right triangle you add the squares of the 2 smaller sides.
The hypotenuse is….
the longest side of a right triangle
Finding the square root of a number means…
Finding the square root of a number means a number that you multiply times itself 2 times that equals that number
Finding the cube root of a number means….
Finding the cube root of a number means a number that you multiply times itself 3 times that equals that number
When you are asked to find the distance between 2 points in the coordinate plane you need to….
connect the points to make a right triangle and use the Pythagorean theorem to find C, the hypotenuse
When finding C, the hypotenuse, your answer should be bigger or smaller?
bigger
When finding a or b, should your answer be bigger or smaller?
smaller
