Let a = 7 , b = 7, and c = 13. c is always the biggest number.
Acute Triangle is when

Right Triangle is when

Obtuse Triangle is when
Answer:
30.5
Step-by-step explanation:
cos18=29/x --> reciprocate for simplicity : 1/cos18=x/29 --> solve for x
Answer:
2
Step-by-step explanation:
6-4=2
Answer:
- corner angles are 80° (∠JKL) and 100° (∠MJK)
- side lengths are 2√61
Step-by-step explanation:
The given length measures are the diagonals of the rhombus, so each side will be the hypotenuse of the triangle with legs half as long:
√(12² +10²) = √244 = 2√61 ≈ 15.62 . . . . side length
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The given angle measure is half the measure at ∠J. The full measure of ∠J is 100°, so the measure of ∠K is 180° -100° = 80°
There are two things you should do right away
Divide through by minus 3
Substitute another letter (say z) for x^2
Step One
-3x^4/-3 +27x^2/-3 + 1200/-3 = 0/-3
x^4 - 9x^2 - 400 = 0
Step 2
Let z = x^2
(x^2)^2 - 9(x^2) - 400 = 0
z^2 - 9z^2 - 400 = 0
Step 3
By factoring solve for z
(z - 25)(z + 16) = 0
z = 25
x^2 = 25
x = +/- 5
============
z + 16 = 0
z = - 16
x^2 = - 16
x = sqrt(-16)
x = +/- 4i
I've included a graph to show that the zeros are correct.