In an isosceles triangle, if a base angle has a measure of 43 degrees, then the vertex angle must have a measure of 80 degrees as well. true or false?

False because the interior angles of any triangle needs to add up to 180°. In an isoceles triangle, the base angles of the triangle are equal so 43° + 43° = 86°. If the vertex angle is 80° then the total is 166°. This doesn't meet 180°, so the vertex angle must be 94° if the base angles are 43°. If the vertex angle must be 80°, then the base angles have to be 50°.

Answer for 2: his profit would be $2.88 explanation: you have to first multiply 72 and 0.12 together to get $8.64 once you do that you know how much money the shopkeeper made from selling the candy bars individually. so you have to do 8.64-5.76=2.88 hope that ; )answer for 3: yeah i’m sorry i have no idea what number 3 is. i’m sorry i couldn’t with that.