Sách Toán – Học Toán – Đề Thi Toán https://booktoan.com Học toán, Đề thi toán, Sách giáo khoa Toán, trắc nghiệm Toán online Fri, 23 Oct 2026 02:59:51 +0000 vi hourly 1 https://wordpress.org/?v=7.1.3 Cho tam giác $ABC$ có ba cạnh $a = 13$, $b = 14$, $c = 15$. Xét tính đúng, sai của các khẳng định sau https://booktoan.com/cho-tam-giac-abc-co-ba-canh-a-13-b-14-c-15-xet-tinh-dung-sai-cua-cac-khang-dinh-sau.html https://booktoan.com/cho-tam-giac-abc-co-ba-canh-a-13-b-14-c-15-xet-tinh-dung-sai-cua-cac-khang-dinh-sau.html#respond Fri, 23 Oct 2026 02:59:51 +0000 https://booktoan.com/cho-tam-giac-abc-co-ba-canh-a-13-b-14-c-15-xet-tinh-dung-sai-cua-cac-khang-dinh-sau.html https://booktoan.com/cho-tam-giac-abc-co-ba-canh-a-13-b-14-c-15-xet-tinh-dung-sai-cua-cac-khang-dinh-sau.html/feed 0 Cho tam giác $ABC$ có $AB = 6$, $AC = 10$ và $\widehat{A} = 120^\circ$. Xét tính đúng, sai của các khẳng định sau https://booktoan.com/cho-tam-giac-abc-co-ab-6-ac-10-va-widehata-120circ-xet-tinh-dung-sai-cua-cac-khang-dinh-sau.html https://booktoan.com/cho-tam-giac-abc-co-ab-6-ac-10-va-widehata-120circ-xet-tinh-dung-sai-cua-cac-khang-dinh-sau.html#respond Fri, 23 Oct 2026 02:55:55 +0000 https://booktoan.com/cho-tam-giac-abc-co-ab-6-ac-10-va-widehata-120circ-xet-tinh-dung-sai-cua-cac-khang-dinh-sau.html https://booktoan.com/cho-tam-giac-abc-co-ab-6-ac-10-va-widehata-120circ-xet-tinh-dung-sai-cua-cac-khang-dinh-sau.html/feed 0 Cho tam giác $ABC$ có $AB = 5$, $AC = 8$ và $\widehat{A} = 60^\circ$. Xét tính đúng, sai của các khẳng định sau https://booktoan.com/cho-tam-giac-abc-co-ab-5-ac-8-va-widehata-60circ-xet-tinh-dung-sai-cua-cac-khang-dinh-sau.html https://booktoan.com/cho-tam-giac-abc-co-ab-5-ac-8-va-widehata-60circ-xet-tinh-dung-sai-cua-cac-khang-dinh-sau.html#respond Fri, 23 Oct 2026 02:51:52 +0000 https://booktoan.com/cho-tam-giac-abc-co-ab-5-ac-8-va-widehata-60circ-xet-tinh-dung-sai-cua-cac-khang-dinh-sau.html https://booktoan.com/cho-tam-giac-abc-co-ab-5-ac-8-va-widehata-60circ-xet-tinh-dung-sai-cua-cac-khang-dinh-sau.html/feed 0 Cho tam giác $ABC$ có $a = 7$, $b = 8$, $c = 5$. Xét tính đúng, sai của các khẳng định sau https://booktoan.com/cho-tam-giac-abc-co-a-7-b-8-c-5-xet-tinh-dung-sai-cua-cac-khang-dinh-sau.html https://booktoan.com/cho-tam-giac-abc-co-a-7-b-8-c-5-xet-tinh-dung-sai-cua-cac-khang-dinh-sau.html#respond Fri, 23 Oct 2026 02:47:11 +0000 https://booktoan.com/cho-tam-giac-abc-co-a-7-b-8-c-5-xet-tinh-dung-sai-cua-cac-khang-dinh-sau.html https://booktoan.com/cho-tam-giac-abc-co-a-7-b-8-c-5-xet-tinh-dung-sai-cua-cac-khang-dinh-sau.html/feed 0 Cho tam giác $ABC$ có $b = 6$, $c = 8$ và $\widehat{A} = 30^\circ$. Tính diện tích tam giác $ABC$ https://booktoan.com/cho-tam-giac-abc-co-b-6-c-8-va-widehata-30circ-tinh-dien-tich-tam-giac-abc.html https://booktoan.com/cho-tam-giac-abc-co-b-6-c-8-va-widehata-30circ-tinh-dien-tich-tam-giac-abc.html#respond Fri, 23 Oct 2026 02:44:53 +0000 https://booktoan.com/cho-tam-giac-abc-co-b-6-c-8-va-widehata-30circ-tinh-dien-tich-tam-giac-abc.html https://booktoan.com/cho-tam-giac-abc-co-b-6-c-8-va-widehata-30circ-tinh-dien-tich-tam-giac-abc.html/feed 0 Cho tam giác $ABC$ có $BC = a$, $CA = b$, $AB = c$ và $R$ là bán kính đường tròn ngoại tiếp. Khẳng định nào sau đây đúng? https://booktoan.com/cho-tam-giac-abc-co-bc-a-ca-b-ab-c-va-r-la-ban-kinh-duong-tron-ngoai-tiep-khang-dinh-nao-sau-day-dung.html https://booktoan.com/cho-tam-giac-abc-co-bc-a-ca-b-ab-c-va-r-la-ban-kinh-duong-tron-ngoai-tiep-khang-dinh-nao-sau-day-dung.html#respond Fri, 23 Oct 2026 02:40:19 +0000 https://booktoan.com/cho-tam-giac-abc-co-bc-a-ca-b-ab-c-va-r-la-ban-kinh-duong-tron-ngoai-tiep-khang-dinh-nao-sau-day-dung.html https://booktoan.com/cho-tam-giac-abc-co-bc-a-ca-b-ab-c-va-r-la-ban-kinh-duong-tron-ngoai-tiep-khang-dinh-nao-sau-day-dung.html/feed 0 Cho tam giác $ABC$ có các cạnh $BC = a$, $CA = b$, $AB = c$. Khẳng định nào sau đây là đúng? https://booktoan.com/cho-tam-giac-abc-co-cac-canh-bc-a-ca-b-ab-c-khang-dinh-nao-sau-day-la-dung.html https://booktoan.com/cho-tam-giac-abc-co-cac-canh-bc-a-ca-b-ab-c-khang-dinh-nao-sau-day-la-dung.html#respond Fri, 23 Oct 2026 02:36:25 +0000 https://booktoan.com/cho-tam-giac-abc-co-cac-canh-bc-a-ca-b-ab-c-khang-dinh-nao-sau-day-la-dung.html https://booktoan.com/cho-tam-giac-abc-co-cac-canh-bc-a-ca-b-ab-c-khang-dinh-nao-sau-day-la-dung.html/feed 0