B. 9 I think because it looks like it is bisected in the middle to cut into two equal parts. Please correct me if I am wrong. Thanks.
It’s B because it’s a primary source because it comes from him
M∠1 + m∠RPQ + m∠5 = 180° Definition of a Straight Angle
proof : mes1= PRQ (alternate interior)
RPQ = 3 Opposite angle (vertex)
5 =Q (alternate interior)
PRQ + RPQ + RQP = 180
"Calculate the square root of 10 (√ 10) to 4 decimal places.<span>Find the perfect square number closer to 10. 32 = 9 and 42 = 16, so take 3.Divide 10 by 3. 10÷3 = 3.33 (you can round off the answer)Average 3.33 and 3. ( 3.33 + 3)÷2 = 3.1667."
Source-</span>http://burningmath.blogspot.com/2013/12/finding-square-roots-of-numbers-that.html
