Draw rectangle ABCD. Then draw a diagonal line connecting points B and D. If triangle BCD is a right isosceles triangle, what do you know about rectangle ABCD?

What is the number 321,000,000 in scientific notation? also what is the number? ?

Angle xyz is formed by segments xy and yz on the coordinate grid below: a coordinate plane is shown. angle xyz has endpoints at 3 comma negative 1 and 6 negative 2 and 3 comma negative 3 and measures 36.87 degrees. angle xyz is rotated 270 degrees counterclockwise about the origin to form angle x′y′z′. which statement shows the measure of angle x′y′z′?

Which of the following is the best first step in solving the equation below? 4+2㏒³x=17