Answer:
For number 8: x=16
Step-by-step explanation:
You will need to use Pythagorean Theorem (a²+b²=c²)for this...
- First, focus on the smaller triangle because you already know 2 sides.
- In order to find the shared side use, 10²+b²=25²
- simplify to 100+b²=625
- subtract 100 from both sides
- b²=525 (the opposite of squaring something is finding the square root)
- √b²=√525
- b=22.9 but round up so b will equal 23 instead
- Now you know the height of both triangles! so you can move onto the next triangle :)
- Use the same equation(a²+b²=c²)
- 23²+b²=28²
- Simplify to 529+b²=784
- subtract 529 from both sides :)
- b²=255
- √
b²=√
255
- b=15.9 but guess what, you can round up to 16! :)
- There ya go. X=16
