Answer:
1. 9
2. 25
3. No (Explanation below)
Step-by-step explanation:
1. Original PT Formula is c=√a²+b²
BUT you're looking for the leg so you now have the formula of a=√c²-b² *c being the hypotenuse
a= √ 15² - 12²
a= √ 225 - 144
a= √81
a= 9
2. 16 + 9 = 25
* you're not looking for an angle therefore you are most likely looking for the length of the side. Simply add the AD and DC together to get the answer. If you were looking for an angle it'll be 180°.
3. NO because a right angle is an angle of exactly 90°, whether it be at a corner of a square/rectangle, a triangle, or where two perpendicular lines intersect. Angle ABC is an obtuse angle as it measures more than 90°
