What is m∠B? A seven sided polygon A B C D E F G with six of the angle measures given. A equals 120 degrees, B equals unknown, C equals 148 degrees, D equals 90 degrees, E equals 142 degrees, F equals 130 degrees, and G equals 129 degrees.
Group of answer choices

51

141

129

134

an angle + its complement = 90 degrees

because the two particles have an equal charge, the charges will cancel out and give the atom an overall charge of 0. so, if at atom has 35 protons in the nucleus, we could expect it to have 35 electrons orbiting that nucleus.

the answer is blue river