Arielle is building the wooden framework for the roof of a house. she needs the angle created by the vertical and horizontal boards of the frame to be a right angle. the height of the vertical board is 12 feet. the length of the horizontal board is 15 feet. the support beam that will connect the ends of the two boards measures 20 feet. which is true regarding the triangular frame? it is an acute triangle. about 0.8 foot needs to be removed from the 20-foot board to create a right triangle. it is an obtuse triangle. about 0.8 foot needs to be removed from the 20-foot board to create a right triangle. it is an acute triangle. about 7 feet need to be removed from the 20-foot board to create a right triangle. it is an obtuse triangle. about 7 feet need to be removed from the 20-foot board to create a right triangle.

It is an obtuse triangle .About 0.8 foot needs to be removed from the 20-foot board to create  a right triangle .

Step-by-step explanation:

Given

Height of vertical board= 12 feet

Height of horizontal board=15 feet

The support beam that will connect the ends of the two boards measures 20 feet.

It means the distance between two boards vertical and horizontal =20 feet

By using pythogorous theorem

=369

369

It means the given triangle is not a right triangle

Hence, the given triangle is an obtuse triangle because the sum of angles of triangle is 180 degree . If the triangle is not a right triangle therefore the triangle is an obtuse.

If it follow pythogorous theorem then

Height of hypotenuse== about 19.20 feet

Therefore, we need to remove the part of board=20-19.20=0.8 foot.

Hence, It is an obtuse triangle .About 0.8 foot needs to be removed from the 20- foot board to create a right triangle.

can someone answer this question plz

step-by-step explanation:

-3

step-by-step explanation:

a drawing really does here:

so i draw the horizontal line y=2 and the vertical line x=-2 at this intersection i put b (this is where my right angle is going to be).   so point b is at (-2,2).   point a is 5 units long and is also on y=2 so this point has to be (3,2) or (-7,2) -doesn't matter i will go with (3,2).

now we know c is at (-2,y) we don't know the y yet bet we know that c is on x=-2.

we have the area of the triangle is .5bh=12.5

we know the base length is 5 (ab)

we have the height is (2-y) if you look at your

plug in

.5(5)(2-y)=12.5

solve for y to get the y-coordinate for c

2.5(2-y)=12.5

divide both sides by 2.5 giving:

2-y=5

now subtract 2 on both sides

-y=3

y=-3