An acute angle is any angle that is below 90 degrees, so 89 degrees is an ancute angle
Answer:

Step-by-step explanation:
sin 45 = opposite / hypotenuse
<u>Where opposite = x , hypotenuse = 4</u>
sin 45 = x / 4
![\sf \frac{\sqrt{2} }{2 } = \frac{x}{4} \\\\x = \frac{4\sqrt{2} }{2} \\\\x = 2\sqrt{2} \\\\\rule[225]{225}{2}](https://tex.z-dn.net/?f=%5Csf%20%5Cfrac%7B%5Csqrt%7B2%7D%20%7D%7B2%20%7D%20%3D%20%5Cfrac%7Bx%7D%7B4%7D%20%5C%5C%5C%5Cx%20%3D%20%5Cfrac%7B4%5Csqrt%7B2%7D%20%7D%7B2%7D%20%5C%5C%5C%5Cx%20%3D%202%5Csqrt%7B2%7D%20%5C%5C%5C%5C%5Crule%5B225%5D%7B225%7D%7B2%7D)
Hope this helped!
<h3>~AH1807</h3>
Answer:
32140
Step-by-step explanation:
Answer:
Same shape and sizes
Step-by-step explanation:
An1 = 3n^2 -7 = 3(1)^2 -7 = 3(1)-7 = -4
an2 = 3n^2 -7 = 3(2)^2 -7 = 3(4)-7 = 5
an3 = 3n^2 -7 = 3(3)^2 -7 = 3(9)-7 = 20
an4 = 3n^2 -7 = 3(4)^2 -7 = 3(16)-7 = 41