Answer:
Total sum of the sides = Sum of sides of triangle + Sum of sides of quadrilateral.
So, overall expression for the sides of the envelop containing triangle and quadrilateral will be:
3t + 4q
Explanation:
So, in an envelope, we have a triangle as well as a quadrilateral.
There will be three sides of a triangle present in the envelop and there will be 4 sides of quadrilateral.
let's suppose that, t showcase the sides of a triangle in the envelope and q showcases the sides of quadrilateral in the envelope.
Total sum of the sides = Sum of sides of triangle + Sum of sides of quadrilateral.
So there is one triangle and one quadrilateral.
Hence, expression of the sides of the triangle will be:
3 sides = t+t+t = 3t
And, expression for the sides of the quadrilateral will be:
4 sides = q +q + q +q = 4q
So, overall expression for the sides of the envelop containing triangle and quadrilateral will be:
3t + 4q