Since we’re looking at the product of 9 and an unknown number (n), you write out an equation stating 9 times n gives you 63. Then you solve for that.
9 * n = 63
9n = 63
9n/9 = 63/9
Therefore n = 7
The height of the cone would be 10 being that fact that if multiplied by 2 you get 20x 5 equals 100
Answer:
associative property
Step-by-step explanation:
280...round each number to the nearest whole number (27.8=28 and 9.8=10) then multiply and you will get 280
Consider the parallelogram shown below.
The lengths of the sides are a and b.
The lengths of the diagonals are 2x and 2y.
Because the diagonals are both congruent and perpendicular, therefore there are two right triangles as shown.
Note that x = y.
Because x = y, each right triangle is isosceles and has the angles 90°, 45° and 45°.
From the Pythagorean theorem,
For one right triangle,
a² = x² + y² = x² + x² = 2x².
For the other right triangle,
b² = y² + x² = x² + x² = 2x²
Therefore
a² = b²
a = b
It follows that all sides of the parallelogram are equal and each angle is
45+45 = 90°
Therefore the parallelogram is a square.