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Balanced Math Planning
Date: ________________________________ Amount of Time: _____________________________
Strand: Geometry
Expectation: 7m46: construct related lines (i.e., parallel; perpendicular;
intersecting at 30º, 45º, and 60º), using angle properties and a variety of tools
and strategies
7m47: sort and classify triangles and quadrilaterals by geometric properties
related to symmetry, angles, and sides, through investigation using a variety of
tools and strategies
7m48: construct angle bisectors and perpendicular bisectors, using a variety of
tools and strategies, and represent equal angles and equal lengths using
mathematical notation
Big Idea: Many geometric properties and attributes are related to measurements.
Minds On
Open
Question
Minds On… Pairs
Word and Picture Sort (TIPS – Board Website)
Students sort the set of cards into categories and explain their reasoning and
criteria for the sort. Students then sort the cards in a different way, using different
criteria (BLM 6.2.1).
Action
SMARTb
oard
Balanced Math Centres
Using the Smartboard, answer the following questions (include diagram or
measurements to prove your answer)
1. In an acute triangle, the measures of two angles are 50° and 60°.
What is the measure of the third angle?
2. In an obtuse triangle, the measures of two angles are 120° and 10°.
What is the measure of the third angle?
3. One acute angle of a right triangle measures 35°. What is the
measure of the other acute angle?
Math
Facts
Math Aids Website (website creates basic fact sheets)
Classifying Angles
Measuring Angles
Classifying Triangles
Math
Games
Shared
Problem
Solving
(1)
Guided
Problem
Solving
Angle Jeopardy
www.math-play.com
1. In a scalene triangle, one side is 5 units more than twice the measure
of the shortest side. The other side is three times the measure of the
shortest side. If the sum of the three sides is 41 units, what is the
measure of each side of the triangle?
Four congruent isosceles right triangles are cut from the 4
corners of a square with a side of 20 units. The length of one
leg of the triangles is equal to 4 units. What is the area of the
remaining octagon?
.
Laptop
Activities
Gizmos
“Investigating Angle Theorems - Activity A”
http://www.explorelearning.com/index.cfm?method=cResource.dsp
View&ResourceID=282
Consolidation
Consolidation: Journal entry is exit ticket
Journal: “Two triangles are almost congruent. Describe the triangles as completely
as you can. Tell why they are almost congruent.