840000 rounded to the nearest hundred thousand
2 answers:
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Answer:
Step-by-step explanation:
Since two sides of the triangle are equal in length, we can conclude that is an isosceles triangle. With this information, we can draw an isosceles triangle to find
. Since the base angles of an isosceles triangle are equal, we can solve for
:
(Angle sum of triangle is
)
(Base angles of isosceles triangles are equal, there is an image attached to show that
is one of the base angles)
Hope this helps :)
Let us assume base of the window = b feet.
Height is 3 feet less than base, that is = (b-3).
Given area of the triangle = 20 feet square.
We know formula for area of a triangle:
Area = × Base × Height
Plugging values in formula, we get
20 =
Factoring quadratic, we get
=0
b+5=0
b=-5
b-8=0
b=8.
For base we can take only positive value.
<h3>Therefore, base of the triangle = 8 feet and height = 8 -3 = 5 feet.</h3>