Answer:
Perimeter = 180
Area = 1080
Step-by-step explanation:
Perimeter is length of all sides added together. 30+78+72 = 180
Area is the length times the height/2 for a triangle. 30*72/2 = 1080
I hope this helped <3
Answer:
- 
Step-by-step explanation:
The reciprocal of a number n is 
The negative reciprocal is the negative of this, thus
reciprocal of 2 is - 