Perimeter = length of the 3 sides of the triangle ie 34units
Since width we are given 6.5 units
We have to find the remaining 2 sides:
Formula of Triangle for Perimeter
P = a + b + c (sum of sides)
simplify: P= a + 2b (its an isosceles)
34 = 6.5 + 2b
34 - 6.5 = 2b
27.5 = 2b
Só b = 13.75 units each length of triangle
Relationship between triangle and rectangle
= rectangle has four right angles, so a triangle has an angle of half since it bisects the edges (ie 45*)
Use Trig Ratios to find L
SOHCAHTOA
we want adjacent ( L)
13.75 sin 45
L = 9.72
Thus your equation is
Equation used to find Triangle × Trig ratios
P = a + 2b
sin 45
Where L is length of rectangle
a is width of triangle
L =(P - a +2b)× sin 45