In the figure

AB = AD, BC = CD
prove that ∠ABC = ∠ADC

Lv beethoven software supplies customized software to a managed healthcare system. lv beethoven software's costs for the software is $1,723,000. lv beethoven software sells the software to the healthcare system for $3,816,981.10. overhead expenses are estimated at 47% of the selling price. what is lv beethoven software's net profit to the nearest dollar?

State if the two triangles are congruent. if they are, state how you know?

Angles r and s are complementary. the measure of angle r is 31 degrees. which equation can be used to find angle s?