Find where to buy the TI-84 Plus CE graphing calculator in a variety of bold, fun colors.
Download free 90-day trial versions of the most popular TI software and handheld emulators.
Bring a new dimension of learning to your classroom with activities that put math in motion.
Learn on your own schedule! All 2021 T³IC sessions are now available on demand through May 31.
We are here to help with distance learning resources for schools and districts.
TI Connect™TI Connect™ CE
TI Connectivity CableUnit-to-Unit link cables
Students visualize the construction of special right triangles and find the ratios of the sides.
Students use Cabri™ Jr. to investigate special right triangles and their trigonometric ratios.
Students begin by constructing an isosceles triangle. Then they construct a perpendicular from the vertex opposite the base to the midpoint of the base. This forms two right triangles with angle measure 30, 60, and 90 degrees.
Students will hide one equilateral triangle and measure the lengths of each leg and the hypotenuse. They use the Calculate tool to find the ratios BD:AB, AD:AB, and AD:BD. As students then drag point C, they should see that the ratios remain constant. Students should also observe that the ratio of lengths of the longer side to that of the shorter side is 1.73, or the square root of three.
© Copyright 1995-2021 Texas Instruments Incorporated. All rights reserved.