The three sides make a right triangle and you know the base (90) and the height (70)
A = 1/2 bh or 1/2 x (70)x (90)= 3150 ft²
The question is not clear, but I’ll take my best guess:
4+ 85y -12 = 0
85y= 8
y= 8/85 (which you can divide to get a decimal answer)
She is not correct, since the combined length of both boards is more than 2 feet
12cm < x >12.2 cm is the inequality i would use
Answer:
this is an obtuse angle and an isosceles triangle
because angle is greater than 90° and two sides are equal.