1-A 2-A 3-D 4-D 5-D 6-B 7-D 8-C 9-D 10-C 11-C 12-B 13-A 14-A 15-C
16-C 17-B 18-C 19-D 20-C 21-C 22-A 23-C 24-D 25-A 26-D 27-A 28-C
29-A 30-A 31-C 32-B 3-A 34-A 35-D 36-B 37-C 38-A 39-C 40-C 41-B
42-A 43-B 44-D 45-C 46-B 47-D 48-A
If you’re not sure why a certain answer is correct, raise your hand and talk to me!
Things you need to memorize: SOHCAHTOA (sin=opp/hyp, cos=adj/hyp, tan=opp/adj) Circle the angle you are referencing, label the sides with respect to that angle.
Pythagorean Theorem, Special Right Triangles (30-60-90)
Angles of a triangle add up to 180. For other shapes, take the number of sides, subtract two, multiply by 180. Exterior angles always add up to 360.
Area of a triangle: 1/2(base)(height) Circles- Circumference: 2πr, πr^2
Only set things equal if they represent the same thing. Use your eyes. If two angles don’t look the same, and you don’t have a good reason why they should be the same, don’t make them equal! Do they add up to a certain number? 90? 180?
A line segment of x combined with a line segment of 5 is x+5, not 5x!
To find the area of an unfamiliar shape, break it up into known triangles and rectangles.
For coordinate points, think hotel rooms: What floor number? What room number? Are you subtracting a floor number from a room number? (you shouldn’t be…)
A counterexample satisfies the hypothesis or conditions of a statement, but doesn’t satisfy the conclusion.
SSS, SAS, AAS congruence (make sure you go in the right order, don’t skip over a side and an angle and then count the next side)