I just got done with algebra 1 and I need help with starting Geometry. What should I know before starting Geometry and what topics should I do first?​

Straight angles are 180 degrees

Complementary angles are 90 degrees

Adjacent angles are next to each other

Vertical angles are the same measure

x=-7

step-by-step explanation:

x+3=-10

-10+3=-7

x=-7

step-by-step explanation:

assume that you have 3 different side lengths.   apply the pythagorean theorem here:   square each of the two shortest sides; call them a and b, so that their squares are a² and b².   also square the longest side, calling the result c².

now, if a² + b² = c² is true, the triangle is a right triangle; otherwise it is not a right triangle.