Find the angle between the given vectors to the nearest tenth of a degree.

u = < 8, 7> , v = < 9, 7>

Yo y do yall have 2 stars that means yall wrong bro

What are “like terms”? why can we only add like terms?

In the following diagram it is given that dec,ab || dc, ad || eb, and ad is congruent to bc. a)why isn't abc a parallelogram even though it has a pair of parallel sides and a pair of congruent sides b)explain why be must be congruent to bc. further explain what type of triangle this makes triangle abc and what it tells you about angle 1 and angle 2c) finally why must angle 3 be congruent to angle 1? further, explain why we know that angle 3 is congruent to angle 2