Please answer all the questions

Explain why triangles are often used to build bridges, roofs, buildings, and other structures.

Which properties of a triangle make it a desirable geometric shape for these applications? Which type of triangle is best?

Why is the triangle preferred over other types of polygons? Explain.

a complex number is a number that can be expressed in the form a + bi, where a and b are real numbers, and i is a solution of the equation x2 = −1. because no real number satisfies this equation, i is called an imaginary number. has no real solution, since the square of a real number cannot be negative.

c. side angle side. u shares the same sides