The sum of two angles in a triangle is equal to the third angle and two sides of the triangle have lengths of 4 and 5 units. find the length of the third side of the triangle, if it is a whole number.

Angle1 +angle2+angle3=180(property of triangle)
Angle1+angel2=angle3(according to question)

Thus,
Angle3+angle3=180
2*angle3=180
Angle3=90
Means this is a right triangle
Now,we can use formula
Side1^2+side2^2=side3^2
Thus,
4*4+5*5=side3^2
Square root(36)=side3
Side3=6

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.

Your answer should be 1/3. i hope i could ! good luck : )