Answer:
2
Step-by-step explanation:
Since there are four negative signs, we have -1 multiplying each other 4 times, multiplying by positive 2. This is then 1 * 2, which is 2.
Answer:
The answer is a. 21.
Step-by-step explanation:
We solve this question by using Pythagoras theorem to relate the sides of a right angled triangle.
Here,
Hypotenuse of the given triangle(c)=75
Two sides of right angled triangle are:
a=72
b=?
Then,
for a given right angled triangle abc,
Using Pythagoras theorem,
![c=\sqrt{a^{2} +b^{2} }](https://tex.z-dn.net/?f=c%3D%5Csqrt%7Ba%5E%7B2%7D%20%2Bb%5E%7B2%7D%20%7D)
Squaring on both sides,
![c^{2} =a^{2}+b^{2}](https://tex.z-dn.net/?f=c%5E%7B2%7D%20%3Da%5E%7B2%7D%2Bb%5E%7B2%7D)
or,![75^{2}=72^{2}+b^{2}](https://tex.z-dn.net/?f=75%5E%7B2%7D%3D72%5E%7B2%7D%2Bb%5E%7B2%7D)
or, ![b^{2}=75^{2}-72^{2}](https://tex.z-dn.net/?f=b%5E%7B2%7D%3D75%5E%7B2%7D-72%5E%7B2%7D)
or,![b^{2}=5625- 5184](https://tex.z-dn.net/?f=b%5E%7B2%7D%3D5625-%205184)
or,![b^{2} =441](https://tex.z-dn.net/?f=b%5E%7B2%7D%20%3D441)
∴![b=21](https://tex.z-dn.net/?f=b%3D21)
So, the value of b is obtained to 21 by the use of Pythagoras theorem.
Answer:
acute triangle
Step-by-step explanation:
We have 3 angles that are not equal to each other
They are all smaller than 90 degrees which means they are acute angles