I'm isosceles triangle ABC shown below, AC is congruent to BC as shown. Side AC has been extended through point C to point D. Explain why the measure of angle BCD must be twice the measure of angle A

Which mathematical statements are true? 1) if 3 is an odd number, then 3 times 3 is an even number. 2) if 6 is less than 7, then 4 is greater than 7. 3) six is divisible by 3, and 10 is a multiple of 2. 4) the average of the data is greater than the largest value in the data, or it’s less than the largest value in the data. 5) the slope of a linear graph is its rate of change, and the graph’s y-intercept is the initial value. 6) if an equilateral triangle has equal angles, then all its angles will measure 45°.

Solve the system of equations y= 3/2 - 1, -x+ y =-3

The interior angles formed by the side of a hexagon have measures of them up to 720° what is the measure of angle a