B. Prove the following using indirect proof. 1. If x = 3, then 3x + 5 ≠10 2. If a triangle is an isosceles triangle ( 2 sides are equal), then the base angles cannot measure 92 degrees. 3. Given: 3 - 5 ≠ 13 Prove: r≠6 4.Given: x = 5 Prove: 2x + 4 12