PtQtR=180
cos (QR-P) tcas (R+P-Q) + cos(P+Q-R)
sin²p+heas P. cos Q. cas R+ cos²p​

60°

step-by-step explanation:

the measure angle of c in an isosceles triangle abc is 60° because in isosceles triangle,the measures of all the angles is 60°.

none of these

step-by-step explanation:

23 + 34 add up to 57 so just inform the teacher of this really stupid mistake

twenty-six miles over two gallons because the proportion for the original 13 miles to one gallon would be written 13/1 and, doing the same thing to the top and bottom, i multiplied by 2 and got 26/2

236 cm 16 time 12 = 192

6 times 7 = 42

192+42