Geometry Portal

Unit_3a_3b_Review_Vids

Review Supplement 3a/3b: Q1

Solving a quadratic proportion. Duration_2_55

Review Supplement 3a/3b: Q2-Q4

Graphing a dilation in the coordinate plane, identifying the center of dilation and scale factor, and writing a coordinate mapping for the dilation. Duration_6_19

Review Supplement 3a/3b: Q5-Q6

Solving a quadratic proportion to find the side lengths in a dilation, then writing a coordinate mapping for the dilation. Duration_4_30

Review Supplement 3a/3b: Q16

Indirectly finding the height of a flagpole using a mirror and similar triangles. Duration_2_33

Review Supplement 3a/3b: Q20

Using Parallel Lines Proportionality Theorem to solve for a distance between parallel lines. Duration_1_45

Review Supplement 3a/3b: Q21

Using Parallel Lines Proportionality Theorem to solve for a distance between parallel lines. Duration_3_58

Review Supplement 3a/3b: Q23

Solving a quadratic proportion based on similar right triangles and the geometric mean (Heartbeat Method). Duration_3_03

Review Supplement 3a/3b: Q24

Solving a system of equations based on similar right triangles and the geometric mean (Boomerang Method). Duration_2_47

Calculator_Vids

Review Calculator Programming 3a/3b: Q1

User inputs two side lengths. Calculator determines the range of possible values for the third side length. Duration_6_56

Challenge 1 Sol.mp4

Review Supplement 2c: Q2

User inputs three sets of noncollinear coordinates. Calculator determines if the triangle formed by joining the user’s coordinates is scalene, isosceles, or equilateral. In the video, Mr. T references a program TRI, which plots a triangle in the coordinate plane based on a user's input. See PrgmTRI video below for details. Duration_15_14

Challenge 3 Sol.mp4

PrgmTRI

User inputs three sets of noncollinear coordinates. Calculator determines if it is possible to create a triangle using the points, and graph the resulting triangle using the LINE( command found in the DRAW menu. Duration_9_21

Challenge 2 Sol.mp4

Construction_Vids

Review Constructions 3a/3b: Q1

Constructing a dilation using a compass and straightedge. Duration_6_13

Review Constructions 3a/3b: Q2

Using a compass and straightedge to construct a segment whose length is root 2 times the length of a given segment. Duration_2_57

Review Constructions 3a/3b: Q3

Using a compass and straightedge to construct a segment whose length is root 3 times the length of a given segment. Duration_2_34

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