The following cone has a height of 12 cm and a slant height of 16 cm. A right angle is formed between the height and radius of the cone. What is the length of the radius? Enter your answer as the correct value, rounded to the nearest tenth if necessary, like this: 42.5 please help I have made multiple accounts to get no awnser just links and silence so pleasee just help :*(​

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

10 points? me . its important ‼️‼️

Plz hurry evaluate the expression a+b where a=8 and b=19