Bridget Strom (O’Donnell)
Geometry for Secondary Mathematics Teaching - C881
John Czaplewski
Task 1
1/22/2025
A. Identify..a..dynamic..geometry..software..and..explain..how..its..features..facilitate..stud
ent..learning..of..one..of..the..following..geometry..topics:
The..software..I..will..be..using..is..GeoGebra,..a..free..resource..that..combines..Algebra..and..Geome
try...This..software..is..great..for..examining..the..congruence..and..similarity..of..shapes...Students..c
an..create..shapes..using..the..segment,..polygon,..or..circle..tool...They..can..then..have..the..progra
m..give..the..measurements..of..the..angles..and..the..length..of..the..segments...Using..this..informat
ion,..students..can..examine..the..difference..between..when..shapes..are..similar..and..when..they..
are..congruent.
B. Explain..how..to..use..the..features..of..the..dynamic..geometry..software..from..part..A
..to..explore..one..geometric..theorem.
The..theorem..I..will..demonstrate..is..the..Triangle..Angle..Sum..Theorem...This..theorem..states..th
at..the..sum..of..the..interior..angles..in..a..triangle..is..180..degrees...In..GeoGebra,..users..can..use..t
he..polygon..feature..to..create..triangles..of..different..sizes...They..can..then..use..the..angle..feature
..which..will..calculate..the..angle..degrees..inside..each..triangle...The..user..then..can..use..those..c
alculations..to..prove..that..the..sum..of..the..interior..angles..in..a..triangle..is..180..degrees.
1. Illustrate..the..dynamic..action..of..the..exploration..of..the..theorem..from..part.
.B,..using..a..series..of..images.