Use the number line below to calculate 1/2 × 4/6: A number line is shown starting at 0 and ending at 1. The number line is divided into twelfths and the 6th, 8th, and 10th markings after 0 are labeled three-sixths, four-sixths, and five-sixths respectively. A. 1 12

b. 6 12

C. 16 12

D. 4 12

Okay so for every triangle has three angles that always add up to 180 degrees. and to tell the difference between whether they are secure, right or obtuse is that acute: has one angle that is less than 90 degrees. right triangle means there is at least one angle that is exactly 90 degrees. and an obtuse angle has an angle that is bigger than 180 degrees. i’ll do #13 as an example: 13. 40 and 50 so if every triangle has 180 degrees 40+50= 90 degrees then180-90= 90 degrees so the third angle is 90 degrees and because this triangle has a 90 degree angle it means it is a right triangle

Multiply 9 and 67. then multiply 3 with 67. lastly the answer that you got for 9x67 is to be subtracted by the answer you got for 3x67