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ตัวชี้วัด ป. จำแนกรูปสี่เหลี่ยมโดยพิจารณาจากสมบัติของรูปสี่เหลี่ยม
13. กำหนดรูปสี่เหลี่ยม โดยมี และ ยาวไม่เท่ากันแห่ขนานกัน รูปสี่เหลี่ยม QRST คือสี่เหลี่ยมษนิดใด
  1. รูปสี่เหลี่ยม QRST เป็นรูปสี่เหลี่ยมจัตุรัส
  2. รูปลี่เหลี่ยม QPST เป็นรูปสี่เหลี่ยมด้านซนาน
  3. รูปสี่เหลี่ยม QRST เป็นรูปสี่เหลี่ยมคางหมูมุมฉาก 4. รูปสี่เหลี่ยม QPST เป็นรูปสี่เหลี่ยมรุปว่าว

Ask by Stephens Harrington. in Thailand
Jan 26,2025

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รูปสี่เหลี่ยม QRST เป็นรูปสี่เหลี่ยมคางหมูมุมฉาก

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The Deep Dive

ในการพิจารณาสี่เหลี่ยม จากคุณสมบัติที่ระบุว่า และด้าน กับ ขนานกัน แต่มีความยาวไม่เท่ากัน ซึ่งแสดงให้เห็นว่าสองด้านนี้ไม่เท่ากันและขนานกัน เมื่อพิจารณาคุณสมบัติเหล่านี้ ทำให้เราสามารถสรุปได้ว่ารูปสี่เหลี่ยม QRST เป็นรูปสี่เหลี่ยมคางหมูมุมฉาก (ตัวเลือกที่ 3) ครับ
สี่เหลี่ยมคางหมูมุมฉากมีจุดเด่นที่มุมหนึ่งมีมุมฉาก และด้านที่ขนานกันไม่ต้องมีความยาวเท่ากัน ในกรณีนี้เรามีคุณสมบัติเหล่านั้นครบถ้วน ดังนั้นคำตอบคือสี่เหลี่ยมคางหมูมุมฉาก!

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