First one
DE =14 ....so SE = 7
BS = 20....so SM =10
MH =26....so GM = 13
GF = 25
So SE + SM + GM + GF =
7 + 10 + 13 + 25 =
55
Second one
If AN ad CT are perpendicular....then AFT and CFN are right angles
Which implies that
3x + 21 = 90 and y + 45 = 90
Subtract 21 from both sides Subtract 45 from both sides
3x = 69
Divide both sides by 3 y = 45
x = 23
So x + y = 23 + 45 = 68
Last one
The sum of HDR + RDF + SDF = 180
So
55 + HDR + 30 = 180 simplify
HDR + 85 =180 subtract 85 from both sides
HDR = 95
