Given: DABCD has vertices A(-1, -3), B(4, 2), C(3, 9), and D(a, b). a. Find the coordinates of the midpoint of AC. b. Using the results found in part a, determine the coordinates of point D. c. Show that DABCD is a rhombus.

Elementary Geometry For College Students, 7e
7th Edition
ISBN:9781337614085
Author:Alexander, Daniel C.; Koeberlein, Geralyn M.
Publisher:Alexander, Daniel C.; Koeberlein, Geralyn M.
ChapterP: Preliminary Concepts
SectionP.CT: Test
Problem 1CT
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I don't understand how to write sentence proofs for this. Please help thanks!

Given: DABCD has vertices A(-1, -3), B(4, 2),
C(3, 9), and D(a, b).
a. Find the coordinates of the midpoint of AC.
b. Using the results found in part a, determine
the coordinates of point D.
c. Show that DABCD is a rhombus.
Transcribed Image Text:Given: DABCD has vertices A(-1, -3), B(4, 2), C(3, 9), and D(a, b). a. Find the coordinates of the midpoint of AC. b. Using the results found in part a, determine the coordinates of point D. c. Show that DABCD is a rhombus.
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