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  1. Find the measure of the following angle, where △XYZ ≅ △PQR
    by Dr. Osama M. Khaled — published Nov 27, 2025 — last modified Nov 27, 2025 08:51 AM Located in Mathematics / … / Congruent Triangles and Similar Triangles / Identify corresponding parts of congruent triangles
  2. Find the measure of the following side, where △XYZ ≅ △PQR
    by Dr. Osama M. Khaled — published Nov 27, 2025 — last modified Nov 27, 2025 08:51 AM Located in Mathematics / … / Congruent Triangles and Similar Triangles / Identify corresponding parts of congruent triangles
  3. Evaluate expressions involving subtraction and addition
    by Dr. Osama M. Khaled — published Feb 24, 2026 — last modified Mar 07, 2026 07:27 AM — filed under: Year 7
    Expressions can involve repeated subtraction or combinations of subtraction and addition. To evaluate them, we use the order of operations rule.
    Located in Mathematics / … / Integers / Subtracting Integers
  4. Evaluate -1 - (-2) -10
    by Dr. Osama M. Khaled — last modified Feb 24, 2026 01:27 PM Located in Mathematics / … / Subtracting Integers / Evaluate expressions involving subtraction and addition
  5. Evaluate: -3 - 5 - (-1)
    by Dr. Osama M. Khaled — last modified Feb 27, 2026 09:10 AM Located in Mathematics / … / Subtracting Integers / Evaluate expressions involving subtraction and addition
  6. Evaluate: -80 - (-2 - 24)
    by Dr. Osama M. Khaled — last modified Feb 24, 2026 01:28 PM Located in Mathematics / … / Subtracting Integers / Evaluate expressions involving subtraction and addition
  7. Match the number with its name
    by Dr. Osama M. Khaled — published Jul 07, 2025 Located in Mathematics / … / Learning Numbers / Connect number names from 1 to 20
  8. Match the EBS technology with the best use case
    by Dr. Osama M. Khaled — published Mar 27, 2025 — last modified Mar 27, 2025 11:08 PM Located in Computing / … / Amazon Web Services (AWS) / Amazon Elastic Block Store (Amazon EBS) Primer
  9. Civil Service
    by Dr. Osama M. Khaled — published Dec 10, 2023 — last modified Dec 11, 2023 03:39 AM Located in Mathematics / … / Equations to Solve Application Problems / Application problems with unknowns
  10. Playgrounds
    by Dr. Osama M. Khaled — published Dec 11, 2023 — last modified Dec 11, 2023 03:37 AM Located in Mathematics / … / Equations to Solve Application Problems / Application problems with unknowns
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