This document appears to be a worksheet or exercise for students to identify which triangles are similar and explain why. The document provides 5 questions, each with blank spaces for the student to write their answer in 2 sentences for each question. The questions likely show different triangle figures and ask the student to determine if they are similar based on their angles and side lengths and explain the reasoning.

1. แบบฝึกหัด เรื่อง รูปสามเหลี่ยมคล้าย
ชื่อ _______________________ ชั้น ________ เลขที่ ______
จงพิจารณารูปที่กาหนดให้ต่อไปนี้ ข้อใดเป็นรูปสามเหลี่ยมคล้ายกัน เพราะเหตุใด (ข้อละ 2 คะแนน)
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