Math CC7/8 – Sept. 16 Homework: p. 76 #6-9, #40 Things Needed Today (TNT): Math Notebook/Pencil Shapes & Designs 3.2 Labsheet 3.2 Learning Log: Topic: Drawing Triangles Homework: p. 76 #6-9, #40

What’s Happening? Warm Up Lesson- S&D 3.2!

Warm-Up End WRITE down each problem & SOLVE 1 minute WRITE down each problem & SOLVE Show ALL your work & THINKING End

Check your work in a different colored pen or color pencil Answers to Warm Up Check your work in a different colored pen or color pencil

Launch video 3.2 (video A0240932) These SSA won’t create a unique triangle, but some such combinations will. AAA won’t make a congruent triangle, the side lengths may be different.(similar triangle) AAS will make a unique triangle because we know the third angle must be 180-106 degrees. (ASA situation)

Use labsheet 3.2B Draw an equilateral triangle with sides 4cm. Draw an angle of 60 degrees and mark 2 sides of 4 cm on the legs of that angle. Then connect the end points. Draw a right triangle with legs 4 cm and 5 cm. Draw an angle of 90 degrees and mark sides of 1.5 inches and 2 in on the legs of that angle. Then connect the end points.

Use labsheet 3.2B Draw an isosceles triangle with vertex angle 40 degrees and equal sides 2.5 in long. Draw an isosceles triangle with base 4.2 cm long and base angles 70 degrees. You need to give either 2 sides and the included angle, or 2 angles and the side. Angles = 30, 125, 25 degrees Sides = 2, 2.5, and 4 inches

You need at least 3 sides and/or angle measurements, but not ANY three. Given SSS - there will only be one triangle. Given 2 angles and one side length (either the included side (ASA) or the nonincluded side (AAS)), there will be only ONE triangle.

All copies of the right triangle using the same 3 sides lengths will make the same triangle. The order in which you connect the sides does NOT matter. So, the copy will also be a right triangle. Homework: p. 76 #6 – 9, #40

Homework If time start your HW p. 76 #6-9, # 40